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Polybasite-Tac & Acanthite

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SCH66537

Polybasite-Tac & Acanthite

Description Tabs

Description
Locality: 
Clara Mine, Oberwolfach, Freiburg Region, Baden-Württemberg, Germany
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.4 × 2.2 cm
Description

A polybasite-tac crystal is set in a cavity of the baryte matrix. There are present some light-grey acanthite needle-like growths.

Found in November 1994.

Mineral Data
What's on the rock

Polybasite-Tac

Polytype Of: 

Polybasite

Formula: 
[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Strunz: 
2.GB.15
Hardness: 
2.5 - 3.0

Acanthite

Formula: 
Ag2S
Strunz: 
2.BA.35
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.0 - 2.5
Streak: 
lead grey
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
schani

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